55776716655 has 32 divisors (see below), whose sum is σ = 97371790848. Its totient is φ = 27038793600.

The previous prime is 55776716647. The next prime is 55776716669. The reversal of 55776716655 is 55661767755.

It is a happy number.

It is not a de Polignac number, because 55776716655 - 2³ = 55776716647 is a prime.

It is a super-2 number, since 2×55776716655² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1116870 + ... + 1165740.

It is an arithmetic number, because the mean of its divisors is an integer number (3042868464).

Almost surely, 2^55776716655 is an apocalyptic number.

55776716655 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55776716655 is a deficient number, since it is larger than the sum of its proper divisors (41595074193).

55776716655 is a wasteful number, since it uses less digits than its factorization.

55776716655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55807.

The product of its digits is 46305000, while the sum is 60.

The spelling of 55776716655 in words is "fifty-five billion, seven hundred seventy-six million, seven hundred sixteen thousand, six hundred fifty-five".